1 /*- 2 * BSD LICENSE 3 * 4 * Copyright 2015 6WIND S.A. 5 * Copyright 2015 Mellanox. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of 6WIND S.A. nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <stddef.h> 35 #include <errno.h> 36 #include <assert.h> 37 #include <stdint.h> 38 39 /* DPDK headers don't like -pedantic. */ 40 #ifdef PEDANTIC 41 #pragma GCC diagnostic ignored "-pedantic" 42 #endif 43 #include <rte_ethdev.h> 44 #include <rte_common.h> 45 #ifdef PEDANTIC 46 #pragma GCC diagnostic error "-pedantic" 47 #endif 48 49 #include "mlx5_utils.h" 50 #include "mlx5.h" 51 #include "mlx5_autoconf.h" 52 53 /** 54 * Configure a VLAN filter. 55 * 56 * @param dev 57 * Pointer to Ethernet device structure. 58 * @param vlan_id 59 * VLAN ID to filter. 60 * @param on 61 * Toggle filter. 62 * 63 * @return 64 * 0 on success, errno value on failure. 65 */ 66 static int 67 vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on) 68 { 69 struct priv *priv = dev->data->dev_private; 70 unsigned int i; 71 72 DEBUG("%p: %s VLAN filter ID %" PRIu16, 73 (void *)dev, (on ? "enable" : "disable"), vlan_id); 74 assert(priv->vlan_filter_n <= RTE_DIM(priv->vlan_filter)); 75 for (i = 0; (i != priv->vlan_filter_n); ++i) 76 if (priv->vlan_filter[i] == vlan_id) 77 break; 78 /* Check if there's room for another VLAN filter. */ 79 if (i == RTE_DIM(priv->vlan_filter)) 80 return ENOMEM; 81 if (i < priv->vlan_filter_n) { 82 assert(priv->vlan_filter_n != 0); 83 /* Enabling an existing VLAN filter has no effect. */ 84 if (on) 85 return 0; 86 /* Remove VLAN filter from list. */ 87 --priv->vlan_filter_n; 88 memmove(&priv->vlan_filter[i], 89 &priv->vlan_filter[i + 1], 90 priv->vlan_filter_n - i); 91 priv->vlan_filter[priv->vlan_filter_n] = 0; 92 } else { 93 assert(i == priv->vlan_filter_n); 94 /* Disabling an unknown VLAN filter has no effect. */ 95 if (!on) 96 return 0; 97 /* Add new VLAN filter. */ 98 priv->vlan_filter[priv->vlan_filter_n] = vlan_id; 99 ++priv->vlan_filter_n; 100 } 101 /* Rehash flows in all hash RX queues. */ 102 priv_mac_addrs_disable(priv); 103 priv_special_flow_disable_all(priv); 104 return priv_rehash_flows(priv); 105 } 106 107 /** 108 * DPDK callback to configure a VLAN filter. 109 * 110 * @param dev 111 * Pointer to Ethernet device structure. 112 * @param vlan_id 113 * VLAN ID to filter. 114 * @param on 115 * Toggle filter. 116 * 117 * @return 118 * 0 on success, negative errno value on failure. 119 */ 120 int 121 mlx5_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on) 122 { 123 struct priv *priv = dev->data->dev_private; 124 int ret; 125 126 priv_lock(priv); 127 ret = vlan_filter_set(dev, vlan_id, on); 128 priv_unlock(priv); 129 assert(ret >= 0); 130 return -ret; 131 } 132 133 /** 134 * Set/reset VLAN stripping for a specific queue. 135 * 136 * @param priv 137 * Pointer to private structure. 138 * @param idx 139 * RX queue index. 140 * @param on 141 * Enable/disable VLAN stripping. 142 */ 143 static void 144 priv_vlan_strip_queue_set(struct priv *priv, uint16_t idx, int on) 145 { 146 struct rxq *rxq = (*priv->rxqs)[idx]; 147 struct rxq_ctrl *rxq_ctrl = container_of(rxq, struct rxq_ctrl, rxq); 148 struct ibv_exp_wq_attr mod; 149 uint16_t vlan_offloads = 150 (on ? IBV_EXP_RECEIVE_WQ_CVLAN_STRIP : 0) | 151 0; 152 int err; 153 154 DEBUG("set VLAN offloads 0x%x for port %d queue %d", 155 vlan_offloads, rxq->port_id, idx); 156 mod = (struct ibv_exp_wq_attr){ 157 .attr_mask = IBV_EXP_WQ_ATTR_VLAN_OFFLOADS, 158 .vlan_offloads = vlan_offloads, 159 }; 160 161 err = ibv_exp_modify_wq(rxq_ctrl->wq, &mod); 162 if (err) { 163 ERROR("%p: failed to modified stripping mode: %s", 164 (void *)priv, strerror(err)); 165 return; 166 } 167 168 /* Update related bits in RX queue. */ 169 rxq->vlan_strip = !!on; 170 } 171 172 /** 173 * Callback to set/reset VLAN stripping for a specific queue. 174 * 175 * @param dev 176 * Pointer to Ethernet device structure. 177 * @param queue 178 * RX queue index. 179 * @param on 180 * Enable/disable VLAN stripping. 181 */ 182 void 183 mlx5_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue, int on) 184 { 185 struct priv *priv = dev->data->dev_private; 186 187 /* Validate hw support */ 188 if (!priv->hw_vlan_strip) { 189 ERROR("VLAN stripping is not supported"); 190 return; 191 } 192 193 /* Validate queue number */ 194 if (queue >= priv->rxqs_n) { 195 ERROR("VLAN stripping, invalid queue number %d", queue); 196 return; 197 } 198 199 priv_lock(priv); 200 priv_vlan_strip_queue_set(priv, queue, on); 201 priv_unlock(priv); 202 } 203 204 /** 205 * Callback to set/reset VLAN offloads for a port. 206 * 207 * @param dev 208 * Pointer to Ethernet device structure. 209 * @param mask 210 * VLAN offload bit mask. 211 */ 212 void 213 mlx5_vlan_offload_set(struct rte_eth_dev *dev, int mask) 214 { 215 struct priv *priv = dev->data->dev_private; 216 unsigned int i; 217 218 if (mask & ETH_VLAN_STRIP_MASK) { 219 int hw_vlan_strip = !!dev->data->dev_conf.rxmode.hw_vlan_strip; 220 221 if (!priv->hw_vlan_strip) { 222 ERROR("VLAN stripping is not supported"); 223 return; 224 } 225 226 /* Run on every RX queue and set/reset VLAN stripping. */ 227 priv_lock(priv); 228 for (i = 0; (i != priv->rxqs_n); i++) 229 priv_vlan_strip_queue_set(priv, i, hw_vlan_strip); 230 priv_unlock(priv); 231 } 232 } 233